G-GPE Scaling a Triangle in the Coordinate Plane

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This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Below is a picture of $\triangle ABC$ with vertices lying on grid points: Draw the image of $\triangle ABC$ when it is scaled with a scale factor of $\...